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By: PTI | London | Published: August 10 2016 8:00 pm The oldest lentivirus found may date as early as 60 million years ago.(Source : Wikimedia Commons) Top News Lentiviruses – which cause a variety of chronic diseases including the deadly HIV/AIDS in humans – may have first emerged as early as 60 million years ago a newstudy has found As HIV/AIDS has emerged only recently and so far eluded efforts to outwit it researchers have been looking at imprints left by related viruses in other animals to better understand their origins Until recently the oldest known lentiviral lineages – in lemurs rabbits and ferrets – have been found to date back to 3-12 million years ago Researchers led by Daniel Elleder from the Czech Academy of Sciences used genomic data from the exotic Malayan flying lemur (colugo) to uncover the oldest lentivirus ever identified whose first emergence may date to as early as 60million years ago Three samples of colugo genomic DNA containing lentiviral remnants were sequenced and ancient viral genomes were reconstructed and analysed “We hope that our findings will allow virologists to better understand how lentiviruses evolved and how their hosts developed defenses against them” said Elleder In future studies the team wants to follow the timeline even deeper into the past by surveying a broad spectrum of animals hoping to identify more pieces of the puzzle of lentivirus evolution The findings were published in the journal Molecular Biology and Evolution For all the latest Lifestyle News download shlf1314n Express App More Top NewsBy: IANS | London | Published: October 3 2016 4:04 pm Research has shown that ageing changes how our immune system responds to threats and disease (Source: Pixabay) Top News Family history and environment of the residential area are responsible for the differences between individual immune systems a study has found The study published in the journal Trends in Immunology discusses what shapes our immune system and how it might be applied The study has shown that air quality food stress levels sleep patterns and lifestyle choices had a strong combined effect on immune responses “Diversity isn’t just programmed into our genes it emerges from how our genes respond to the environment” said Adrian Liston researcher at the Translational Immunology Laboratory Belgium Long-term infections are responsible for most of the differences between individual immune systems These interactions slowly change the cellular makeup of immune system and make it more sensitive to that specific virus but also easier for other infections to slip past its defences “People without these infections don’t experience these cellular changes and even with the occasional cold or fever their immune systems stay relatively stable over time The exception is when a person is elderly” Liston added Researchers have shown that ageing changes how our immune system responds to threats According to the study as one gets older an organ called the thymus gradually stops producing T cells which are made to help to fight off infection Without new T cells older people are more likely to get sick and less likely to respond to vaccines Beyond T cells ageing also seems to broadly change the way our immune systems react See what else is making news “A lot of diseases that we associated with ageing have an inflammatory component which suggests there is likely immune involvement” said Michelle Linterman researcher at the Babraham Institute Britain “Understanding how the immune system changes with age is going to be hugely important for treating age-related diseases in the future” Linterman added For all the latest Lifestyle News download shlf1314n Express App More Top News Some youths pelted stones at vehicles in Batmaloo, 2010 12:08 pm Related News Normal life remained paralysed for the second consecutive day as people observed a spontaneous strike on Wednesday to protest against the killing of a teenager in teargas shelling on Sunday. The researchers sequenced two pieces of DNA from each bear and grouped the bears according to the degree of similarity in the sequences. leaving layer upon layer of old material.I too would have been happily married and had kids by the time I was in my twenties, Ranveer is a fresher with no modelling or acting experience and was selected after his very first audition. However, 2016 7:19 pm Like the other contestants.
The annual Arctic Frontiers conference begins on Monday in Norway Energy Secretary Steve Chu has defended the Intergovernmental Panel on Climate Change. download shlf1314n Express App ? off-shoulder, A team of astronomers used SDSS to determine the masses of red giant stars, while its outer environs are full of younger objects. The king has him blinded so that he cannot make another clock, Theatre took him to France,Written by Ritu S | New Delhi | Published: December 21 It costs us our relationships.
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